html , body , ul , ol , h1 , h2, h3 , h4, h5 , p , div {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
a ,
a:hover ,
a:focus {
    color: #333;
    text-decoration: none;
    /* 针对移动端 点击链接标签点击高亮 */
    -webkit-tap-highlight-color: transparent;
}

ul , 
ol {
    list-style: none;
}

input , button , textarea {
    border: 0;
    outline: none;
}

.clearfix::after {
    content: "";
    display: block;
    clear: both;
}